| 2809.20.00 | 40 | Polyphosphoric acids | t | | | |
| 2811 | | Other inorganic acids and other inorganic oxygen compounds of nonmetals: | | | | |
| 2811.11.00 | 00 | Hydrogen fluoride (Hydrofluoric acid) | kg | Free | | Free |
| 2811.19.30 | 00 | Hydrobromic acid | kg | Free | | 25% |
| 2811.19.60 | 05 | Hydrogen cyanide | kg | | | |
| 2811.21.00 | 00 | Other inorganic oxygen compounds of nonmetals: | | | | |
| 2811.22.10 | 00 | Synthetic silica gel | kg | 3.7% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2812.10.50 | 05 | Arsenic trichloride, carbonyl dichloride (phosgene), sulfur monochloride, sulfur dichloride and thionyl chloride | kg | | | |
| 2812.10.50 | 10 | Phosphorus oxychloride and trichloride | kg | | | |
| 2814 | | IV. INORGANIC BASES AND OXIDES, HYDROXIDES AND PEROXIDES OF METALS | | | | |
| 2814 | | Ammonia, anhydrous or in aqueous solution: | | | | |
| 2814.10.00 | 00 | Anhydrous ammonia | t | Free | | Free |
| 2815 | | Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium: | | | | |
| 2815.11.00 | 00 | Sodium hydroxide (Caustic soda): | | | | |
| 2815.12.00 | 00 | In aqueous solution (Soda lye or liquid soda) | kg NaOH kg | Free | | 1.1¢/kg |
| 2815.20.00 | | Potassium hydroxide (Caustic potash) | | Free | | 2.2¢/kg |
| 2816 | | Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium: | | | | |
| 2816.10.00 | 00 | Hydroxide and peroxide of magnesium | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2816.40 | | Oxides, hydroxides and peroxides, of strontium or barium: | | | | |
| 2818 | | Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide: | | | | |
| 2818.10 | | Artificial corundum, whether or not chemically defined: | | | | |
| 2818.10.20 | 10 | White, pink or ruby, containing more than 97.5 percent by weight of aluminum oxide | kg | | | |
| 2818.30.00 | 00 | Aluminum hydroxide | kg | Free | | 1.1¢/kg |
| 2819 | | Chromium oxides and hydroxides: | | | | |
| 2821 | | Iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O3: | | | | |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
